23142887 has 2 divisors, whose sum is σ = 23142888. Its totient is φ = 23142886.

The previous prime is 23142883. The next prime is 23142919. The reversal of 23142887 is 78824132.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 23142887 - 2² = 23142883 is a prime.

It is equal to p_1456658 and since 23142887 and 1456658 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23142881) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11571443 + 11571444.

It is an arithmetic number, because the mean of its divisors is an integer number (11571444).

Almost surely, 2^23142887 is an apocalyptic number.

23142887 is a deficient number, since it is larger than the sum of its proper divisors (1).

23142887 is an equidigital number, since it uses as much as digits as its factorization.

23142887 is an evil number, because the sum of its binary digits is even.

The product of its digits is 21504, while the sum is 35.

The square root of 23142887 is about 4810.7054576226. The cubic root of 23142887 is about 284.9743980285.

The spelling of 23142887 in words is "twenty-three million, one hundred forty-two thousand, eight hundred eighty-seven".